50 g of pure Na2CO3 were dissolved in water and the volume of this solution was 200 mL. To this solution, 500 mL of 0.10 M HCl solution were added. Calculate the followings:                                                     Moles of Na2CO3 dissolved Moles of HCl added Moles of Na2CO3 reacted with HCl Moles of Na2CO3 left unreacted Molarity of Na2CO3 solution after the reaction

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